348 AhGJE CONFERVOIDE^. [Calithamnion, 



of an inch to an inch in height, forming large velvety patches, of a deep 

 red or purple colour. Capsules (discovered by the acute and indefatigable 

 Capt. Carviichael) elliptical, minute, borne in clusters on short, spread- 

 ing, corymbose ramuli, situated near the apices of the branches. 



32. C. Jloridnlum, Ag. {pale-red Calithamnion); filaments short 

 densely entangled sparingly branched, branches alternate or sub- 

 dichotomous nearly simple appressed, articulations thrice as 

 long as broad. — Ag, Sp. Alg. v. 2. p. 188. — Conferva florida, 

 Dillw. Conf. Supp. t. F. 



Rocks near low-water mark ; Galway coast, Dr. Scott. Antrim, Mr. 

 J. T. Machmj — This, I have little doubt, is only C. Rotkii, altered by 

 growing in deeper water. 



33. C. repms, Lyngb. (creeping Calithamnion); filaments 

 creeping, stems erect broadly tufted, branches alternate patent 

 with a few short ramuli, articulations 3 — 6 times longer than 

 broad, capsules sphserical on long simple or branched pedicel! s. 

 Lyngb.Hydroph.Dan.p. 128. t. 40. Ag. Sp. Alg. v. 2, p. 184.— 

 Conferva repens, Dillw. Conf. t. 18. E. Bot. t. 1608, (the young 



plant). — Conf. te?iclla, Dillw. Conf. Supp. t. F. 



On the larger Algce y especially Furcellaria lumbricalis, common. — Tufts 

 1 — 1^ inch high, deep-red, forming a dense woolly coating on the in- 

 fested Alga?. Capsules sphaerical, or long pedicells. 



34. C. mesocdrpum, Carm. (medial-fruited Calithamnion); 

 " filaments minute csespitose, branches virgate erect, articulations 

 4 — 5 times longer than broad, capsules elliptical on long pedi- 

 cels." Carm. 



Rocks at the extremity of low- water mark; Appin, Capt.Carmichael. Rare. 

 — " Tufts contiguous, forming a broad shaggy purple crust. Filaments 

 2 — 3 lines long, sparingly branched; branches long, straight, erect, simple 

 and subsecund. Cajmdes crowded about the middle of the filaments, 

 secund or opposite, on long single-jointed or forked peduncles, the cap- 

 sules, in the latter case, either in the axils or substituted for a branch of 

 the fork. I could not discover that it sprung from creeping filaments." 

 Carm. MSS. This appears to come very near C. strictum of Agardh. 

 ** minutely tufted, parasitical. 



35. C. spdrsum, Harv. (scattered Calithamnion); filaments 

 minutely tufted scattered sparingly branched, branches spread- 

 ing unequal, articulations twice or thrice as long as broad, 

 " capsules obovate sessile mostly axillary." (Carm.) — C.fiori- 

 dulum, Lyngb. Hydroph. Dan. p. 136? 



On old stems of Lam. saccharina, at Appin, Capt. CarmichaeL On 

 Conf. nqjestris, at Miltown Malbay, JV. H. Harvey. — Scarcely a line high, 

 forming minute scattered tufts. Stems nearly simple, erect, slightly 

 branched beyond the middle, branches erecto-patent, alternate or secund, 

 of unequal length, apices obtuse. — This is probably the Cal. flori- 

 dulum of Lyngbye. It is better distinguished from C. Rothii by its mi- 

 nute size and scattered habit, than by any precise character. The fruit, 

 however, is very different. 



36. C. Daviesii, Ag. (Davies' Calithamnion); rose-red mi- 

 nute tufted much branched, branches flexuose scattered distant 



